s390/zcrypt: Introduce QACT support for AP bus devices.

This patch introduces a new ap_qact() function which
exploits the PQAP(QACT) subfunction. QACT is a new
interface to Query the Ap Compatilibity Type based
on a given AP qid, type, mode and version.

Based on this new function the AP bus scan code is
slightly reworked to use this new interface for
querying the compatible type for each new AP queue
device detected. So new and unknown devices can
get automatically mapped to a compatible type and
handled without the need for toleration patches
for every new hardware.

The currently highest known hardware is CEX6S.
With this patch a possible successor can get
queried for a combatible type known by the device
driver without the need for an toleration patch.

Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c
index e8300630e197..428623fa517e 100644
--- a/drivers/s390/crypto/ap_card.c
+++ b/drivers/s390/crypto/ap_card.c
@@ -170,19 +170,20 @@ static void ap_card_device_release(struct device *dev)
 	kfree(ac);
 }
 
-struct ap_card *ap_card_create(int id, int queue_depth, int device_type,
-			       unsigned int functions)
+struct ap_card *ap_card_create(int id, int queue_depth, int raw_type,
+			       int comp_type, unsigned int functions)
 {
 	struct ap_card *ac;
 
 	ac = kzalloc(sizeof(*ac), GFP_KERNEL);
 	if (!ac)
 		return NULL;
+	INIT_LIST_HEAD(&ac->list);
 	INIT_LIST_HEAD(&ac->queues);
 	ac->ap_dev.device.release = ap_card_device_release;
 	ac->ap_dev.device.type = &ap_card_type;
-	ac->ap_dev.device_type = device_type;
-	ac->raw_hwtype = device_type;
+	ac->ap_dev.device_type = comp_type;
+	ac->raw_hwtype = raw_type;
 	ac->queue_depth = queue_depth;
 	ac->functions = functions;
 	ac->id = id;